SmogRank / United States / Arizona / Casas Adobes

Casas Adobes, month by month

Casas Adobes has a measured daily mean on 1,371 days since 1 January 2023. Its worst month was December 2024, at 55 US AQI (11.2 µg/m³), 744th of 2,616 cities on that month's world ranking. Its cleanest was September 2025, at 19 US AQI (3.4 µg/m³). 2025 averaged 33 US AQI (6.0 µg/m³), against 36 US AQI (6.4 µg/m³) in 2024.

Every month since 2023

202630 so far283 days measured2,595th of 2,798 in the world

Jan29#2,309 Feb28#2,604 Mar34#2,509 Apr37#2,009 May29#2,249 Jun27#2,175 Jul34#2,374 Aug36#2,334 Sep22#2,752 Oct13#2,752

202533 for the year359 days measured2,360th of 2,681 in the world

Jan53#981 Feb39#1,831 Mar32#2,329 Apr29#2,506 May34#1,862 Jun35#2,128 Jul32#2,420 Aug33#2,535 Sep19#3,026 Oct27#2,137 Nov29#2,349 Dec31#2,559

202436 for the year365 days measured1,671st of 2,097 in the world

Jan46#1,182 Feb32#1,929 Mar28#1,331 Apr27#2,002 May32#2,073 Jun32#2,112 Jul30#2,159 Aug19#1,982 Sep32#1,594 Oct49#666 Nov41#1,590 Dec55#744

202332 for the year364 days measured1,192nd of 1,355 in the world

Jan46#660 Feb31#1,046 Mar26#823 Apr42#902 May28#1,419 Jun28#1,414 Jul29#1,193 Aug24#1,896 Sep22#2,103 Oct30#1,662 Nov34#1,654 Dec47#1,105

Each square is a month's mean PM2.5 in US AQI from Casas Adobes's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Casas Adobes marked; each year, the year's. A dashed square is the running month, so far.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Casas Adobes's worst months

Month	US AQI	Days measured	World rank
December 2024	5511.2 µg/m³	31 of 31	744thof 2,616
January 2025	5310.1 µg/m³	31 of 31	981stof 2,474
October 2024	498.8 µg/m³	31 of 31	666thof 2,020
December 2023	478.5 µg/m³	31 of 31	1,105thof 2,247
January 2023	468.3 µg/m³	31 of 31	660thof 1,261
January 2024	468.2 µg/m³	30 of 31	1,182ndof 2,385

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Casas Adobes's worst days

Day	US AQI
28 Mar 2026	8828.9 µg/m³
1 Jan 2025	7723.0 µg/m³
8 Jan 2025	7522.2 µg/m³
1 Jan 2024	7522.0 µg/m³
17 Dec 2024	7220.2 µg/m³
20 Jun 2024	7019.3 µg/m³
9 Jul 2026	7019.2 µg/m³
12 Oct 2024	7019.1 µg/m³
11 Jul 2024	6918.5 µg/m³
1 Oct 2024	6818.0 µg/m³

Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Casas Adobes, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/casas-adobes/history (accessed 13 Oct 2026).

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Casas Adobes now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 02:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).